Valve



July 26, 1949.

HOLTZ 2,477,127

VALVE Filed May 19, 1945 figa.

INVENTOR, G05 7741 HOL TZ.

AGENT.

Patented July 26, 1949 UNITED'STATES' PATENT OFFICE Gustav Holtz, SanFrancisco, Calif.

Application May 19, 1945, Serial No. 594,705

The present invention relates to valves suitable for controlling theflow of fluids, and more particularly to improvements in theconstruction of valves of the manually opened, self-closing type. Incertain applications wherein valves are employed, it is often desirableto provide a valve which may be quickly opened by hand and which willautomatically return to closed position when the operating handle isreleased.- Such valves, for example, are commonly used upon ships andother places for flushing water closets. Valves of this type aregenerally opened manually against the action of a spring and returned toclosed position again through the action of the sprin or springs. It hasbeen proposed in the past to mount the valves slidably in a housingwhich is provided with openings so that the water flowing through thevalve casing will also enter above the valve proper and assist thespring or springs in returning the valve to its seat. When thisarrangement is not employed, it is necessary to provide a sprin havingsufficient force not only to return the valve to closed position butalso to overcome the pressure of the water below the valve body andbetween the valve and the valve seat.

In my prior United States Patent No. 1,589,696, issued June 22, 1926,there is shown a manually opening, self-closing valve wherein theadvantage is taken of the water pressure to assist in closing the valve.The present invention relates primarily to certain improvements inthe'structure and operation of the valve disclosed in the patentreferred to above.

In my previously mentioned patent the valve housing is provided withopenings which serve the purpose of permitting the water or other fluidto enter above the valve proper, tl'iese openings also serving as guidesfor the movement of the valve. Accordingly the openings are arranged inthe form of angularly disposed slots, into which an element carried bythe valve stem enters, the valve stem proper extending upward from thevalve through the tubular housing and carrying a handle, whereby it maybe turned, and at the same time will be lifted in a direction to openthe valve, owing to the engagement of the projections on the lower endof valve stern with the anew larly disposed slots. A compression springmounted above the valve and surrounding the valve stem serves to returnthe valve stem and valve to closed position when the handle re.- leased,the pressure of the water entering the housing also assisting inbringing about the clo sure of the valve. The projections carried byClaims. (Cl. 251-132) the valve stem which engage the angularly disposedslots are in the form of a pin passing through the valve stem andprovided with antifric-tion rollers at the opposite ends thereof whichtravel in the aforementioned slots.

A primary object of the present invention is to provide improvedconstruction in the pin carried by the valve stem which engages theangularly disposed slots. A further object is to provide a pin of thetype described above which provides greater bearing surface andaccordingly facilitates operation of the valve. Another object is toprovide a pin of the class described which is simple in construction,foolproof in operation and readily replaced when worn or damaged. Astill further object of the invention is to provide an improved valvestem packing arrangement for valves of the present type.

Additional objects, together with some of the advantages to be derivedin utilizing the present invention, will become apparent from thefollowing detailed description thereof taken together with theaccompanying drawings forming part of the specification and wherein:

Fig. 1 is a vertical elevation, partly in section, illustrating theconstruction and assembly of a manually opening, self-closing valveaccording tothe invention. I

Fig. 2 is a vertical elevation of the valve parts shown removed from thevalve casing.

Fig. 3 is a fragmentary elevation, partly in section, taken through3-3'oi Fig. 2.

'Fig. .is an elevation, partly in section, of the improved guide pinutilized in the invention.

Referring particularly to Figs. 1, 2 and 3, the valve shown inthe-accompanying drawings comprises a valve casing I, having threadedintake and discharge openings 2 and 3, between which openings isprovided a web 4 having a removable valve seat 5 threadedly engagedthereto. The valve unit 6 extends into the casing l and is removablypositioned in place by a flanged, internally threaded collar 8 whichscrews onto a nipple a carried. by easing l. Collar 8 engages an annularflange ill on the especially constructed cylindrical housing ll of valveunit It, also engaging the outer end of nipple 9. In this manner valveI2 is disposed in proper'relation to its seat so that it may be seatedand unseated on valve seat 5 while. remaining in the lower end ofhousing ll.

Valve I 2. is detachably mounted in cap l3 in the lower end of valvestem M by a suitable fastening, such as the threaded bolt-and-nutarrangement shownat 5, although it will be appreciated that anydesirable detachable fastening may be employed for this purpose. Valvestem l4 extends upwardly through the opening in the upper end of housingII and on its upper end is provided with an operating handle or lever I!detachably mounted thereon. Valve stem 14 is also provided with arigidly secured collar it which may be formed as a part of the valvestem, if desired, pin 20 passing through collar [8 and valve stem I 4 inslidable and rotatable relationship therewith. A compression spring' 23is mounted on valve stem l4 and engages at its upper end a packingelement supporting collar 24 slidably mounted on valve stem M, the lowerend of compression spring 23 abutting against collar l8.

Pin 20 is sufficiently long to extend beyond the diameter of collar I8and engages angularly disposed slots 22 and 22 provided in the sides ofvalve housing H. The portion of valve housing ll containing the slots 22and 22* therein is spaced from the wall of valve casing I and wateraccordingly enters the housing through intake opening 2 and slots 22 and22. Thus the pressure of the water is directly applied to the upper sideof cap l3, in which valve I2 is mounted, and tends to force valve [2 andvalve stem H in a direction to seat valve l2 on valve seat 5. The boreof the housing which receives the valve l2 and cap l3 as they are raisedis enlarged, as indicated at 25, and the lower end of the valve is ofless area accordingly than the upper end, as a result of which a greaterpressure is exerted on the intake side of the valve than on thedischarge side thereof; this pressure diiferential serving to assist thespring 23 in bringing about automatic closin of the valve.

Referring particularly to Figs. 3 and 4, the guide pin comprises a firstroller 3! provided with a stem portion 32 which is, in turn, providedwith a groove 33 towards the end thereof. A second roller 34 is drilledto receive the stem portion 32 of roller 3|. When the two rollers havebeen assembled, as shown in the drawing, roller 34 is swaged, asindicated at 35, thereby indenting the interior surface of roller 34into the groove 33 of stem portion 32. The swaging operation is carriedout in such manner that when completed the two rollers can not beseparated from each other but are freely rotatable with respect to eachother.

It will be seen that the guide pin illustrated serves as ananti-friction roller, although constructed of but two parts, and thatsubstantially the entire length of the stem 32 serves as a, hearingsurface for rotation of roller 34 with respect to the roller 3|. Thefacile rotation of these rollers, with respect to each other, isnecessitated by the fact that they must rotate in opposite directionswhile engaging slots 22 and 22 in valve housing H as the valve is openedand closed by manipulation of handle I1,

The valve stem packing arrangement, referring to Fig. 1, comprises apacking ring 2'! formed of rubber, leather or other suitable packingmaterial which is engaged by collar 24 which is constantly urgedupwardly against packing ring 21 by the compression spring 23. Valvehousing H-terminates in a threaded nipple 36 having an internal diametersufliciently larger than valve stem l4 to permit insertion of a secondpacking ring and packing ring follower 29 which is in the form of acollar slidably mounted on valve stem l4. Cap 28 is rotatably mounted onvalve stem l4 and threadedly engages nipple 36. As cap 28 is threadedonto nipple l3 it bears against the top of packing ring follower 29,thereby exerting pressure on packing ring 30 and forming a fluid-tightseal between valve stem l4 and packing ring 30.

In the operation of the valve, when valve handle I! is turned in acounter-clockwise direction, in looking down on the valve, in Fig. 1 itwill be seen that collar [8 is rotated with valve stem l4, therebyrotating the pin 20, which, due to its engagement'with slots 22 and 22,brings about a simultaneous lifting of valve 12 from valve seat 5 asvalve stem I4 is turned. Compression spring 23 is, of course, furthercompressed as collar IB is raised by the action of the guide pin 20. Inthis manner the flow of water through intake, outlet 2 and dischargeoutlet 3 is permitted. When handle I l is released pressure of water inthe valve casing l I above cap l3 and; valve l2, assists compressionspring 23 in returning the valve to closed position, guide pin 20rotating valve stem 14 and valve l2 as it is closed and thereby furtherinsuring firm seating of valve l 2 in valve seat 5.

I claim:

1. A valve comprising a casing having intake and discharge openings, avalve seat in said casing, a tubular valve housing mounted in saidcasing, valve means including a valve stem mounted rotatably in saidtubular housing, said valve means engaging said valve seat to preventfluid flow from said intake opening to said discharge opening when saidvalve means is in closed position, said valve housing being providedwith angularly disposed guide slots in the walls thereof, and a guidepin extending through said valve stem in slidable and rotatablerelationship therewith and engaging said guide slots, whereby said valvemeans is raised and lowered with rotation of said valve stem, said guidepin comprising a first roller provided with a cylindrical stem and asecond roller rotatably mounted on said cylindrical stem, each of saidrollers engaging said valve stem and oppositely rotatable relative toone another.

2. A valve comprising a valve casing having intake and dischargeopenings, a tubular valve housing mounted in said valve casing, a valveseat mounted in said valve casing, valve means including a valve stemrotatably and slidably mounted in said valve housing, said valve stemextending through the top of said valve housing, packing means engagingsaid valve stem whereby fluid leakage around said valve stem at thepoint whereat said valve stem passes through said valve housing isprevented, said valve means engaging said valve seat to prevent fluidflow from said intake opening to said discharge opening when said valvemeans is in closed position, spring means normally urging said valve toclosed position and simultaneously urging said packing means againstsaid valve stem, said valve housing being provided with angularlydisposed guide slots in the walls thereof providing flow communicationbetween said intake opening and the interior of said valve housing abovesaid valve means, and a guide pin extending through said valve stem inslidable and rotatable relationship therewith and engaging said guideslots, whereby said valve means is raised and lowered with rotation ofsaid valve stem, said guide pin comprising a first roller provided witha cylindrical stem at one end thereof, said cylindrical stem beingprovided with an annular roove and a second roller rotatably mounted onsaid cylindrical stem, said second roller being circumferentially swagedinto said annular groove in said cylindrical stem, thereby preventingseparation of said rollers, each of said rollers engaging said valvestem and oppositely rotatable relative to one another.

3. In a valve actuating mechanism the combination comprising a valvehousing, valve means including a valve stem slidably and rotatablymounted in said valve housing, and a guide pin slidably and rotatablymounted in said valve stem and extending transversely therethrough, saidvalve housing being provided with angularly disposed guide slots, theends of said guide pin engaging said guide slots, whereby said valvemeans is raised and lowered upon rotation of said valve stem in saidvalve housing, said guide pin comprising a first roller provided with acylindrical projection on one end thereof and a second roller rotatablymounted on said cylindrical projection, each of said rollers engagingsaid valve stem and oppositely rotatable relative to one another.

4. In a valve actuating mechanism the combination comprising a valvehousing, valve means including a valve stem slidably and rotatablymounted in said valve housing, and a guide pin slidably and rotatablymounted in said valve stem and extending transversely therethrough, saidvalve housing being provided with angularly disposed guide slots, theends of said guide pin engaging said guide slots, whereby said valvemeans is raised and lowered upon rotation of said valve stem in saidvalve housing, said guide pin comprising a first roller provided with acylindrical projection coaxially disposed at one end thereof, saidcylindrical projection being provided with an annular groove, and asecond roller having the same external diameter as said first roller androtatably mounted on said cylindrical projection, said cylindricalprojection being disposed entirely within said second roller and saidsecond roller being circumferentially swaged into said annular groove insaid cylindrical projection, thereby preventing separation of saidrollers, each of said rollers engaging said valve stem and oppositelyrotatable relative to one another.

5. A valve comprising a casing havin an inlet and outlet, a valvehousing in said casing, valve means comprising a valve stem rotatablymounted in said housing, said valve housing provided with angularlydisposed guide slots in the walls thereof, a transverse bore provided insaid valve stem, and a guide pin extending through said bore andengaging said guide slots, whereby said pin is raised and lowered withrotation of said valve stem, said guide pin comprising a pair of rollersrotatable relative to one another, each of said rollers engaging saidvalve stem, the portions of said guide pin engaging said guide slotsbeing rotatable relative to one another.

GUSTAV HOLTZ.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,365,694 Jernstedt Jan, 18, 19211,589,696 Holtz June 22, 1926 20691 48 Pickup Feb. 9, 1937

